Quidditch is the worst sport ever invented. Here are four reasons:
1. There is no minimum length of the match.
The Gryffindor vs. Hufflepuff match in Book 1 lasts 5 minutes! Can you imagine making a trip to the pitch to watch a match for 5 minutes?!
2. The snitch is worth 150 points.
Score differentials for average basketball games are separated by 10 points (4 - 5 baskets). Score differentials for average NFL games are 11 points (2 - 4 scoring plays). Based on other sports, scoring with the quaffle is completely useless.
3. As a spectator sport, it is useless.
The most important aspect of the game - the snitch - is completely invisible from the stands.
4. There isn't a standard broom - so the better-funded team is positioned to dominate since the equipment plays such a huge role in the game.